Ejector



(ModeL) H-. COLL.

v EJEGTOR. No. 246,084. Patented Aug. 23.1881.

Mimssea isxwmwm 4.m V M Why N. PETERS. FhulbLilhcgmpher. Washington. 0. c.

UNITED STATES Par p xgr FFICEQ HUGH COLL, OF BLACK HAWK, ASSIGNOR TO J. B. 817 WM. J. SHERRIFF,

OF PITTSBURG, PENNSYLVANIA.

EJ ECTOR.

SPECIFICATION forming part of Letters Patent No. 246,084, dated August 23, 1881.

Application filed February .11, 1881. (ModeL) To all whom it may concern:

Be it known that I, HUGH COLL, of Black Hawk, in the county of Beaver and State of Pennsylvania, have invented a new and useful Improvement inEjectors and I do heretages of this construction are that it enables me to make and finish the heads and various parts of a doubleacting ejector separately, thereby securing more perfect form, better operation facility in fitting, and cheapening the manufacture.

To enable others skilled in the manufacture to make and use my invention, I will now describe its construction and manner of use by reference to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of my improved pump. Fig. 2 is a perspective View of the inner head, and Fig. 3 is a modified form of my improvement.

Like letters of reference indicate like parts in each.

The outer head, a, is of the usual or any desired form, and is provided with a steam-nozzle, I), and inductionopening 0. The inner head, (1, is a separate piece, and is formed with a collar or flange, 6, designed to fit into and close the outer end, f, of the head a.

In order to make the pump double-actingthat is, to take its water through both heads- Iprovide suitable openings or water-passages, 0', through the flange c, which openings may be round or ofany other desired shape. If desired,the periphery of the flange may be screwthreaded, and by being screwed into the coupling f be attached to and support the head cl in the head a, or it maybe plain, and be merely dropped into the coupling f, and held there by screwing in the discharge-pipe. (Shown in dotted lines.) The outer'jextension, c of the head at may be omitted, if desired, as it is merely a guide for the innerjet. It acts also to increase the velocityof the outer current by reducing the width of the passage.

The operation of the ejector is as follows: The steam-jet drives out the air from the inner head first, and the water flowing in is caught by the jet and propelled with great velocity through the narrow symmetrical inner head. This draws the air from the outer head through the holes 6, and after it the water, establishing the double stream, and securing the known advantages of the doubleactin g ejector.

Fig. 3 shows a modification in which the outlet-openings c of the outer head, a enter the outer extension, 0 of the head 61, the inner end of said extension being made flaring where itmerges into the flange e. In this case the currents from both heads are brought together in'the tube 6 which is made to operate as a combining-tube.

In making the double-acting ejector in this form I obtain the advantage of finishing the heads separately, as thereby I am enabled to make their curves more perfectly adapted to securing the best operation of the ejector. am also enabled to form the openings which supply the water from the outer head to correspond exactly to the power of the innerjet, and thus regulate the operation of the pump. I also save in the cost of fitting, as the labor is much less upon this form than upon previous forms of double acting ejectors. The flange closes the end of the outer head,except as to the openings 6. The effect of this is to preserve the steam-jetfrom total condensation until it passes the limit of the head-that is to say, it does not meet the second supply of water-and is consequently still alive until it passes entirely beyond the head into the discharge-pipe, andhence has still a reserve power to apply to obtaining a greater velocity and a oonseqeent increase of capacity. This tends to prevent all backlash or reaction in the outer head.

By the term double head herein used I mean an ejector having an outer shell and an independent inner shell composed of the combining and discharge tube, the inner shell head closing the end of the outer head, an out- Ward extension of the inner head or combinin g-tube beyond the outer head, and discharge- 15 openings opening from the outerhead through the flange into the said combining-tube, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand.

HUGH COLL. Witnesses:

T. B. KERR, D. E. DAVIS. 

